Medical Device Technologies, Inc.

Sherwood Medical Company

Harold G Leigh

David L O'Dell

Hugh A Bourassa

Richard W Gilson

Paul R Ewalt

James D Taylor

A biopsy device incorporating a housing, having a slide member therein, with one of a stylet or cannula connecting to the slide, while the other is fixed to the housing, such that when the slide member is shifted longitudinally within the housing, a displacement occurs between the forwardmost portions of the styler and cannula, generating a reduced pressure therein, for aspirating a biopsy for analysis.

Single use automated soft tissue aspiration biopsy device

Soft tissue biopsy apparatus (10) for obtaining a tissue specimen. An elongate housing (12) has an opening (20) at one end (14). A hollow cannula (26) is positioned within the housing, is reciprocally movable therewithin, and one end (28) of the needle extends through the opening for insertion into tissue (T) from which a specimen is to be taken. A needle (44) is positioned within the cannula, is reciprocally movable therewithin, and also has an end (46) extending through the opening for insertion into the tissue. This needle has a recess (50) adjacent its outer end in which a tissue specimen is captured. The needle is connected to a slide (68) by which the needle is moved independently of the cannula. A sleeve (110) installed over the housing is manually operable to move the slide to a selected and cocked position prior to insertion of the cannula/needle into the tissue. Movement of the slide moves the second needle from a first position to a second position while the cannula remains stationary. A release mechanism (114) operable by the user after the insertion of the assembly into the tissue initially returns the needle to its first position and then moves the cannula from a first position to a second position. Movement of the cannula to its second position causes the end of the said cannula to cover the end of the needle to capture the tissues specimen within the recess.

Disposable spring-loaded soft tissue biopsy apparatus

A biopsy device incorporating a housing, having a slide member therein, with one of a stylet or cannula connecting to the slide, while the other is fixed to the housing, such that when the slide member is shifted longitudinally within the housing, a displacement occurs between the forwardmost portions of the stylet and cannula, generating a reduced pressure therein, for aspirating a biopsy for analysis.

Soft tissue biopsy apparatus (10) for obtaining a tissue specimen. An elongate housing (12) has an opening (20) at one end (14). A hollow cannula (26) is positioned within the housing, is reciprocally movable therewithin, and one end (28) of the needle extends through the opening for insertion into tissue (T) from which a specimen is to be taken. A needle (44) is positioned within the cannula, is reciprocally movable therewithin, and also has an end (46) extending through the opening for insertion into the tissue. This needle has a recess (50) adjacent its outer end in which a tissue specimen is captured. The needle is connected to a slide (68) by which the needle is moved independently of the cannula. A sleeve (110) installed over the housing is manually operable to move the slide to a selected and cocked position prior to insertion of the cannula/needle into the tissue. Movement of the slide moves the second needle from a first position to a second position while the cannula remains stationary. A release mechanism (114) operable by the user after insertion of the assembly into the tissue initially returns the needle to its first position and then moves the cannula from a first position to a second position. Movement of the cannula to its second position causes the end of the said cannula to cover the end of the needle to capture the tissue speciment within the recess.

Disposable soft tissue biopsy apparatus

A locking device attached to the exterior of a syringe barrel includes a flat body having a circular opening therein for passage of a syringe plunger reciprocatably therethrough. Arms depend from the flat body to frictionally hold the device against rotation with respect to the syringe barrel when a syringe plunger is rotated to engage the locking device. At least two ridges extend chordally across the circular opening, the distance between the ridges being selected so that the ridges engage the syringe plunger when the plunger is oriented in one position but not when the plunger is oriented in another position.

Growing community of inventors

St. Louis, MO, United States of America

Harold G Leigh